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Show 114 A Report upon the Determination of the Astronomical Co- ordinates of the Stations at Cheyenne, Wyoming, and Colorado Springs, Colorado, quarto, was issued in January, 1874. MAP- PUBLIOATIONS. Topographical atlas. - An advanced- sheet issue of this atlas has been photolithographed during the year. It contains ( 1) title- sheet, ( 2) legend- page, ( 3) basin- chart, ( 4) progress- map, and sheets Nos. 50, 58, 59, and 66. A 2,000- copy edition has been published, and 486 sets distributed; 500 copies of sheets Nos. 50, 58, 59, and 66 have been priuted on thin paper for preliminary distribution. Proofs have been presented of sheets Nos. 50,59, and 66, executed by the crayon- process. No. 59 is within a few days of completion. In addition, there are in the hands of the lithographer, of which proofs are to be furnished soon, ( 1) index map, ( 2) general topographical map of the area west of the Mississippi River, and ( 3) an explanation- sheet. Sheets 49 and 67 are in an advanced state of preparation, and go forward soon to the lithographer. Sheets 57, 65, 75, 76, 83, and portions of 77 and 84, are in process of construction on a scale of one inch to eight miles. The southeastern, northeastern, and southwestern parts of sheet 61, and the southeastern quarter of sheet 52, are being constructed on a scale of one inch to four miles. All of the sheets above mentioned will doubtless be completed and published during the coming year. The several photographic copies of the preliminary maps for office- use are printed by the photographer of the expedition. There have been made, during the year, issues of the preliminary maps of 1869 and 1871 and of the office- map of 1872. There is a large and increasing call for maps of the comparatively unknown regions west of the one hundredth meridian, and the edition . already authorized will be insufficient to meet the wants of the present fiscal year. The atlas of geological maps is referred to in the main body of the report. From material gathered, fourteen sheets are proposed for publication. The following estimate for the publication of maps and illustrations for the reports is submitted for the fiscal year ending June 30, 1876. The amount is the same as that appropriated for the present fiscal year. For preparation, photolithographing, engraving, and printing atlas and otber topographical maps, including the field- work of 1874 $ 15,000 For preparation, photolithographing, engraving, and printing geological maps, to include the work of the field- season of 1>* 73 2,500 Fqr engraving and printing plate and other illustrations for reports 7,500 Total 25,000 The amount appropriated for engraving and printing illustrations for the reports of explorations and surveys west of the one hundredth meridian, for the fiscal year ending June 30,1875, is $ 25,000. Amount required for the preparation, engraving, and printing of topographical and geological atlas, maps, and illustrations for reports for the year ending June 30,1876, § 25,000. A copy of the progress- map is herewith, showing approximately the areas surveyed up to the close of the field- season of 1873. Very respectfully, your obedient servant, GEORGE M. WHEELER, First Lieut, of Engineers, hi charge. Brig. GEN. A. A. HUMPHREYS, Chief of Engineers, U. S. Army. |
